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Cation insertion to break the activity/stability relationship for highly active oxygen evolution reaction catalyst

DOI: 10.1038/s41467-020-15231-x DOI Help

Authors: Chunzhen Yang (Collège de France; Sun Yat-Sen University) , Gwenaëlle Rousse (Collège de France; Réseau sur le Stockage Electrochimique de l’Energie (RS2E), CNRS) , Katrine Louise Svane (Technical University of Denmark) , Paul E. Pearce (Collège de France; Réseau sur le Stockage Electrochimique de l’Energie (RS2E), CNRS) , Artem M. Abakumov (Skolkovo Institute of Science and Technology) , Michael Deschamps (Réseau sur le Stockage Electrochimique de l’Energie (RS2E), CNRS; Université d’Orléans) , Giannantonio Cibin (Diamond Light Source) , Alan V. Chadwick (University of Kent; ALISTORE-European Research Institute) , Daniel Alves Dalla Corte (Collège de France; Réseau sur le Stockage Electrochimique de l’Energie (RS2E), CNRS) , Heine Anton Hansen (Technical University of Denmark) , Tejs Vegge (Technical University of Denmark) , Jean-marie Tarascon (Collège de France; Réseau sur le Stockage Electrochimique de l’Energie (RS2E), CNRS; Sorbonne Université; ALISTORE-European Research Institute) , Alexis Grimaud (Collège de France; Réseau sur le Stockage Electrochimique de l’Energie (RS2E), CNRS)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nature Communications , VOL 11

State: Published (Approved)
Published: March 2020
Diamond Proposal Number(s): 14239

Open Access Open Access

Abstract: The production of hydrogen at a large scale by the environmentally-friendly electrolysis process is currently hampered by the slow kinetics of the oxygen evolution reaction (OER). We report a solid electrocatalyst α-Li2IrO3 which upon oxidation/delithiation chemically reacts with water to form a hydrated birnessite phase, the OER activity of which is five times greater than its non-reacted counterpart. This reaction enlists a bulk redox process during which hydrated potassium ions from the alkaline electrolyte are inserted into the structure while water is oxidized and oxygen evolved. This singular charge balance process for which the electrocatalyst is solid but the reaction is homogeneous in nature allows stabilizing the surface of the catalyst while ensuring stable OER performances, thus breaking the activity/stability tradeoff normally encountered for OER catalysts.

Journal Keywords: Electrocatalysis; Inorganic chemistry; Materials for energy and catalysis

Subject Areas: Chemistry, Energy


Instruments: B18-Core EXAFS

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s41467-020-15231-x.pdf